U.S. Sen. Bob Corker speaks at the Murfreesboro Rotary Club meeting at the Stones River County Club, on Tuesday Aug. 6, 2013.

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Inability of the United States to deal with fiscal problems such as funding Medicare threatens the country's economy, U.S. Sen. Bob Corker told an audience here.

"That still is our greatest challenge," the Republican senator from Chattanooga told the packed Murfreesboro Noon Rotary Club meal at the Stones River Country Club. "This issue to me is the greatest threat to our nation."

He noted that the average American family will pay $119,000 into funding Medicare, yet will end up receiving $357,000 in Medicare benefits. ...